HuagongsheHuagongshe Chemistry Print Report · For research reference only
Acetic Acid → Hydrochloric Acid
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Acetic Acid | HCID 176 | — |
| Reactant | HCID 20332240 | HCID 20332240 | — |
| Product | Hydrochloric Acid | HCID 313 | — |
| Product | 6-Chloro-3,4-dihydro-8-methyl-2H-1-benzopyran-4-carboxylic acid | HCID 13953801 | — |
Reaction Steps
Following the procedure of Example 2, 6-chloro-8-methyl-4-cyano-4-trimethylsilyloxy-3,4-dihydro-2H-1-benzopyran (3.1 g.), and stannous chloride dihydrate (12.0 g.) were reacted in glacial acetic acid (25 ml.) and concentrated hydrochloric acid (25 ml.) to form 6-chloro-8-methyl-3,4-dihydro-2H-1-benzopyran-4-carboxylic acid. Recrystallization from hexane yielded 1.67 g. of product, m.p. 95°-96° C.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04210663 |
| Source dataset | uspto-grants-1980_07 |
| ORD ID | ord-8598afdb8e874dab890ff11bff254c72 |
| Source note | uspto-grants-1980_07 |